Calibration Grade Blackbody Systems

Our blackbody systems (cavity or extended area) are ideal calibrated, traceable, sources for the infrared bands. They are designed to provide infrared radiation as an ideal blackbody emitter. The output energy from the cavity closely follows the theoretical maximum energy curve described by Max Planck’s equation, and allows users to calibrate, align, and measure infrared devices and phenomena of all types.

The 20º tapered – recessed – cone, surface emissivity, and cavity aspect ratio combine to provide blackbody radiation by multiple reflection, absorption and re-emission of its thermal energy. The thermal energy of the cavity is provided by a ceramic-sealed heater coil that uniformly heats the cavity cylinder.

A range of models and options are available. Two of the most popular systems are described below:

IR-508/301

The smaller size, lower power consumption and affordability make the IR-508 ideal for applications with limited space and power, such as in environmental chambers down to -80º C. Using the optional 8 position aperture wheel, the infrared flux can be varied by known amounts without disturbing critical optical setups, and combining apertures and distance changes, the flux at any point can easily be determined.

IR-564/301

The IR-564 has been the industry standard 1200ºC blackbody for more than 30 years, and continues to provide excellent service to infrared applications throughout the industry.

Using an aperture wheel, which comes standard on the IR-564, the infrared flux can be varied by known amounts without disturbing critical optical setups, and combining apertures and distance changes, the flux at any point can easily be determined.

IR 140/301 – Extended Source

The extended area sources are flat plate emitters with special high emissivity coating providing 0.96 average emissivity. Extended area sources provide large target with high radiant intensity for application where a cavity blackbody is too small.